OpenAI Code Popular

OpenAI Codex

Advanced coding capabilities built on GPT-5 Codex models. Supports code generation, debugging, and complex engineering workflows.

256K Context window

Text Modalities

Code-tuned Specialty

Yes Streaming

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Model ID gpt-5-4-codex /v1/chat/completions

Our pricing –60% vs official

Input tokens per 1M tok

$0.700

Output tokens per 1M tok

$5.60

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

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No credit card required to test

Capabilities

What OpenAI Codex
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Streaming

Server-sent events out of the box

Function calling

Parallel & nested tool calls

Long context

200K+ tokens of working memory

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Streaming, tool-calling, structured output

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

response = client.chat.completions.create(
  model=gpt-5-4-codex,
  messages=[{"role": user, "content": Hello!}]
)
print(response.choices[0].message.content)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.chat.completions.create({
  model:    gpt-5-4-codex,
  messages: [{ role: user, content: Hello! }],
});
console.log(res.choices[0].message.content);

cURL

curl https://api.belugapi.com/v1/v1/chat/completions \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"gpt-5-4-codex","messages":[{"role":"user","content":"Hello!"}]}

Highlights

Built for production.

Code generation

Debugging

Engineering workflows

Streaming

Complete guide

Everything about
OpenAI Codex.

Specifications, pricing, capabilities, and integration tips — kept up to date with every OpenAI release.

By OpenAI 2 min read Updated May 2026

Advanced coding capabilities built on GPT-5 Codex models. Supports code generation, debugging, and complex engineering workflows.

Overview

OpenAI Codex is a cutting-edge code generation ai developed by OpenAI, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in code generation, debugging, engineering workflows, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, OpenAI Codex delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	OpenAI Codex
Provider	OpenAI
Category	Code Generation AI
Model Type	Code

Pricing

Input: $0.70/M tokens (140 credits)
Output: $5.60/M tokens (1120 credits)

Savings vs Official: ~60%

Key Features & Capabilities

Code Generation: Advanced capability for professional-grade output.
Debugging: Advanced capability for professional-grade output.
Engineering Workflows: Advanced capability for professional-grade output.
Streaming: Advanced capability for professional-grade output.

Use Cases & Applications

Automated code generation
Bug detection and debugging
Code review automation
Developer productivity tools

Frequently asked questions

What is OpenAI Codex best used for?

OpenAI Codex excels at code generation, debugging, engineering workflows, making it ideal for professional and enterprise applications.

Who developed OpenAI Codex?

OpenAI Codex was developed by OpenAI, a leading AI research and development company.

How do I integrate OpenAI Codex into my application?

You can integrate OpenAI Codex via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for OpenAI Codex?

Pricing is based on input. Check the pricing section above for detailed rates.

Ready to ship? Start using OpenAI Codex in under 30 seconds.

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